Balancer for internal-combustion engines



Feb. 14, 1928.

w. s. FISHER BALANCER FOR INTERNAL GOMBUS'IION ENGINES Filed March 25. 1925 2 snets-sneet 1 vR. mn H Ww mF s. R E T .,H. w

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TToR Fea 14, 192s. V1,658,979

w. s. FISHER BALANCER FOR INTERNAL COMBUSTION ENGINES Filed March 23 1925 2 Sheets-Sheet 2 INVENToR. fWGfLTE/R S. F75/IER Patented Feb. 14, 1928. y

u stares WALTER s. FISHER, oF TOLEDO, omo, AssIGN'on 'roman w1LLYs-ovnnLAND com- PANY, F TOLEDO, OHIO,

A CORPORATION OF OHIO.

IBA'LANCER FOR INTERNAL-COMBUSTION ENGINES.

Application med Marchas, 1925. semi ne. 17,510.

This invention relates to balancers for intei-nal combustion engines, and more particularly to the s'callefd harmonic balancers used for balancing the secondary inertia -forces of the reciprocating parts inl internal combustion engines.

O ne object of this invention is to provide a harmonic balancer that is well lubricated. 4ir'nother object of the invention is to prol,yide a harmonic balancer that will actas an Lengine oil pump. l t

A further object of v/tlie invention is to provide fa harmonic balancer that will have its moving parts cushioned by a coplous flow of oil. i K

Other objects will appear from the description to follow, covering certain embodiments of the invention, which, for the purposes of the present application, I have illustrated in the accompanying drawings, in which:

Figure I is a sectional view through a portion of an internal coml` istion en ine having a harmonic balancer construe according to one embodiment of the invention.

Fig. II is a sectional view taken on the line II-II of Fig. I.

Fig. III is a sectional view taken on the line III- III of Fig. I, and

Fig. IV is a sectional view taken on the line IV-IV of Fig. III.

Referring to the drawings, in which like characters represent like arts throughout the respective views, 1 is tli and 2 is the lower or oil base portion of the crankcase, which is secured to the upper portion 1 by bolts 3. Secured to the crankshaft 4, which is supported at the center by a bearing 5 and bearing cap 11 in the crankcase 1, is a gear 6 which meshes with gear 7 of weight 8. W'eight 8A, which is a duplicate ot' weight 8, has its gear 7^ meshed with gear 7 on weight 8, and the ratio of gears 6 and 7 is such, that Weights 8 and 8A are driven at twice the speed 'of crankshaft 4. Weights 8 and 8A are unbalanced about their rotative centers 9 by holes 18, and because of their rotation, produce unbalanced forces which counteract the secondary forces of the pistons (not shown), which are securedto connecting rods 10.

The weights 8 and 8A of the balancer are rotatably supported by shafts fixed by screws 31 in the housing 12, which in turn e upper portion of an internal combustion engine crankcase,

is secured to bearing cap 11 by studs 14 and nuts 13. Housing l2 conforms-to the general -outer contour of wei hts 8 and 8A, but has its inner surface spaced from the welghts 8 and 8A at their out r portions, as shown at 16. The space for ed between the Weights 8, 8A and the housing 12, gradually diminishes toward the center-line between the two weights 8, 8^, and at points 17, reaches aminimum. Froml points 17 the housin 12 is in close proximity to the gears 7 au 7A for a short distance, as in an ordinary gear pump. Webs 19 are in slidin enga ement with the faces of gears 7 endg?A an cyliib drical portions 20 of the weifvhts 8, 8^ so as to make a pocket between tbe lower alves of weights.

- The operation of the-balancer `is asfollows: The rotating crankshaft 4, Aby means of gear 6, drives weights 8," 8f* in the direction shown by the arrows in Fig. III. u The fluid oil 23 in' which housing 12 1s immersed, enters inlet holesy 24 into ace 16between the gears and housing 12, li s the spaces between the teeth of gears 7 and 7^, and is cat'- ried into the pocket 25 surrounded by ears 7, 7A and webs 19. Oil is delivered rom pocket 25 through outlet 21 into passages 22, and from thence throu h yconduits 28 into recesses 29 for oling t e balancer weight bearings 30, and through pipes 26 and conduits 33 and 27 for oihng camshaft 32, crankshaft 4, and other parts of the engine (not shown). i

While I have illustrated and described somewhat in detail, certain embodiments of my invention, it is to be understood that this showing and description are illustrative only, and that I do not regard the invention as limited to the details of construction illustrated and described, except in so far as I have included such limitations within the terms of the following claims, in which it is my intention to claim all novelty inherent in my invention, broadly, as well as specifically.

I claim as my invention:

l. In a harmonic balancer for an internal combustion engine, the combination of a plurality of balancing weights, a supporting housing for said weights, and means for causing said weights to co-operate with said housing for pumping liquids.

2. In a harmonic balancer for an internal combustion engine, the combination of a plurality of revolving Weights, and a supporting housing therefor co-operating v with said Weights for pumping liquids.

3. In a harmonic balancer for an internal combustion engine, the combination of a plurality of moving weights, a housing therefor and forming apocket therewith, said pocket having an outlet, and ineans' for causing the weights to co-operate with the housing for urging a liquid into said pocket and out of said outlet.

l. Inl a harmonic balancer `for an internal combustion engine, the combination of a housing, a plurality of rotatinof unbalanced weights 'supported' thereby an??- forming a pocket with the housing, an outlet from said ocket communicating-With a conduit in the ousing, and said weights cofoperating with said housing for causing a liquid to be-received into said pocket and forcedout of said outlet. 5. The combination of an internal combustion engine, an oil base containing-lubricatino oil, a harmonic balancer for sadyengine tdepending into the oil in said oil base, a housing ,surrounding said balancer, and said balancer comprising movable weights cooperating with said housing to force oil from the oil base to otlieiparts of said enine. g 6. In an internal ycombustion engine, the combination of an oil base containing lubricating oil, a crankshaft having reciprocating parts Aoperatively connected thereto, a harmonicbalancei' driven by said crankshaft, said balancer-'comprising a pair of Weights arranged to rotate in said oil and having intermeshin gear teeth7` and a housing :for

'said' we ig ts having a portion thereof adjalwithin the housing so by the lower surfaces of the Weights and the 09 i meshing gears,

bers in iixed relation tov a housing whereby the balancer is secured to the engine,inlet openings in said housing in communication with the lubricating oil, outlet' openings in said housing in communication with engine parte, and said movable members co-operating with the housing for causing oil to be drawn through the inlet Vopening and forced out of the outlet openings to parts of said engine.

housing, rotating unbalanced weights supi ported thereby,

said weights being disposed that'a pocket is formed inner surfaces of the housing, Said pocket having an outlet, and means whereby the rotation ofthe weights urges a surrounding liquid intofthe-pocket and out of said outlet.

i 9. Inf'combination with bustionizenvine 'havin a harmonic balancer operated* thereby inc uding a set of interan voil baile mechanism adapted to have olsupplied thereto and provi ed with means for discharging the oil, said baille` 7..

being disposed with respect -to the gears in a manner Whereby'the intermeshing teeth of the gears act as a pump to force the oil through they discharge means.

In testimony' whereof, I aix my signature. v WALTER S. FISHER.

aharinonic balancer for an internal combustion engine, the combination of a.

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